/*  -*-  mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8  -*-  */
/**
  ******************************************************************************
  * @file    usbd_req.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    19-March-2012
  * @brief   This file provides the standard USB requests following chapter 9.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "usbd_req.h"
#include "usbd_ioreq.h"
#include "usbd_desc.h"


/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @{
  */


/** @defgroup USBD_REQ
  * @brief USB standard requests module
  * @{
  */

/** @defgroup USBD_REQ_Private_TypesDefinitions
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Defines
  * @{
  */

/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Macros
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Variables
  * @{
  */
extern __IO USB_OTG_DCTL_TypeDef SET_TEST_MODE;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint32_t USBD_ep_status __ALIGN_END  = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint32_t  USBD_default_cfg __ALIGN_END  = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint32_t  USBD_cfg_status __ALIGN_END  = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t USBD_StrDesc[USB_MAX_STR_DESC_SIZ] __ALIGN_END ;
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_FunctionPrototypes
  * @{
  */
static void USBD_GetDescriptor(USB_OTG_CORE_HANDLE  *pdev,
                               USB_SETUP_REQ *req);

static void USBD_SetAddress(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req);

static void USBD_SetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req);

static void USBD_GetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req);

static void USBD_GetStatus(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req);

static void USBD_SetFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req);

static void USBD_ClrFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req);

static uint8_t USBD_GetLen(uint8_t *buf);
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Functions
  * @{
  */


/**
* @brief  USBD_StdDevReq
*         Handle standard usb device requests
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
USBD_Status  USBD_StdDevReq (USB_OTG_CORE_HANDLE  *pdev, USB_SETUP_REQ  *req)
{
    USBD_Status ret = USBD_OK;

    switch (req->bRequest)
    {
    case USB_REQ_GET_DESCRIPTOR:

        USBD_GetDescriptor (pdev, req) ;
        break;

    case USB_REQ_SET_ADDRESS:
        USBD_SetAddress(pdev, req);
        break;

    case USB_REQ_SET_CONFIGURATION:
        USBD_SetConfig (pdev , req);
        break;

    case USB_REQ_GET_CONFIGURATION:
        USBD_GetConfig (pdev , req);
        break;

    case USB_REQ_GET_STATUS:
        USBD_GetStatus (pdev , req);
        break;


    case USB_REQ_SET_FEATURE:
        USBD_SetFeature (pdev , req);
        break;

    case USB_REQ_CLEAR_FEATURE:
        USBD_ClrFeature (pdev , req);
        break;

    default:
        USBD_CtlError(pdev , req);
        break;
    }

    return ret;
}

/**
* @brief  USBD_StdItfReq
*         Handle standard usb interface requests
* @param  pdev: USB OTG device instance
* @param  req: usb request
* @retval status
*/
USBD_Status  USBD_StdItfReq (USB_OTG_CORE_HANDLE  *pdev, USB_SETUP_REQ  *req)
{
    USBD_Status ret = USBD_OK;

    switch (pdev->dev.device_status)
    {
    case USB_OTG_CONFIGURED:

        if (LOBYTE(req->wIndex) <= USBD_ITF_MAX_NUM)
        {
            pdev->dev.class_cb->Setup (pdev, req);

            if((req->wLength == 0)&& (ret == USBD_OK))
            {
                USBD_CtlSendStatus(pdev);
            }
        }
        else
        {
            USBD_CtlError(pdev , req);
        }
        break;

    default:
        USBD_CtlError(pdev , req);
        break;
    }
    return ret;
}

/**
* @brief  USBD_StdEPReq
*         Handle standard usb endpoint requests
* @param  pdev: USB OTG device instance
* @param  req: usb request
* @retval status
*/
USBD_Status  USBD_StdEPReq (USB_OTG_CORE_HANDLE  *pdev, USB_SETUP_REQ  *req)
{

    uint8_t   ep_addr;
    USBD_Status ret = USBD_OK;

    ep_addr  = LOBYTE(req->wIndex);

    switch (req->bRequest)
    {

    case USB_REQ_SET_FEATURE :

        switch (pdev->dev.device_status)
        {
        case USB_OTG_ADDRESSED:
            if ((ep_addr != 0x00) && (ep_addr != 0x80))
            {
                DCD_EP_Stall(pdev , ep_addr);
            }
            break;

        case USB_OTG_CONFIGURED:
            if (req->wValue == USB_FEATURE_EP_HALT)
            {
                if ((ep_addr != 0x00) && (ep_addr != 0x80))
                {
                    DCD_EP_Stall(pdev , ep_addr);

                }
            }
            pdev->dev.class_cb->Setup (pdev, req);
            USBD_CtlSendStatus(pdev);

            break;

        default:
            USBD_CtlError(pdev , req);
            break;
        }
        break;

    case USB_REQ_CLEAR_FEATURE :

        switch (pdev->dev.device_status)
        {
        case USB_OTG_ADDRESSED:
            if ((ep_addr != 0x00) && (ep_addr != 0x80))
            {
                DCD_EP_Stall(pdev , ep_addr);
            }
            break;

        case USB_OTG_CONFIGURED:
            if (req->wValue == USB_FEATURE_EP_HALT)
            {
                if ((ep_addr != 0x00) && (ep_addr != 0x80))
                {
                    DCD_EP_ClrStall(pdev , ep_addr);
                    pdev->dev.class_cb->Setup (pdev, req);
                }
                USBD_CtlSendStatus(pdev);
            }
            break;

        default:
            USBD_CtlError(pdev , req);
            break;
        }
        break;

    case USB_REQ_GET_STATUS:
        switch (pdev->dev.device_status)
        {
        case USB_OTG_ADDRESSED:
            if ((ep_addr != 0x00) && (ep_addr != 0x80))
            {
                DCD_EP_Stall(pdev , ep_addr);
            }
            break;

        case USB_OTG_CONFIGURED:


            if ((ep_addr & 0x80)== 0x80)
            {
                if(pdev->dev.in_ep[ep_addr & 0x7F].is_stall)
                {
                    USBD_ep_status = 0x0001;
                }
                else
                {
                    USBD_ep_status = 0x0000;
                }
            }
            else if ((ep_addr & 0x80)== 0x00)
            {
                if(pdev->dev.out_ep[ep_addr].is_stall)
                {
                    USBD_ep_status = 0x0001;
                }

                else
                {
                    USBD_ep_status = 0x0000;
                }
            }
            USBD_CtlSendData (pdev,
                              (uint8_t *)&USBD_ep_status,
                              2);
            break;

        default:
            USBD_CtlError(pdev , req);
            break;
        }
        break;

    default:
        break;
    }
    return ret;
}
/**
* @brief  USBD_GetDescriptor
*         Handle Get Descriptor requests
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_GetDescriptor(USB_OTG_CORE_HANDLE  *pdev,
                               USB_SETUP_REQ *req)
{
    uint16_t len;
    uint8_t *pbuf;


    switch (req->wValue >> 8)
    {
    case USB_DESC_TYPE_DEVICE:
        pbuf = pdev->dev.usr_device->GetDeviceDescriptor(pdev->cfg.speed, &len);
        if ((req->wLength == 64) ||( pdev->dev.device_status == USB_OTG_DEFAULT))
        {
            len = 8;
        }
        break;

    case USB_DESC_TYPE_CONFIGURATION:
        pbuf   = (uint8_t *)pdev->dev.class_cb->GetConfigDescriptor(pdev->cfg.speed, &len);
#ifdef USB_OTG_HS_CORE
        if((pdev->cfg.speed == USB_OTG_SPEED_FULL )&&
                (pdev->cfg.phy_itface  == USB_OTG_ULPI_PHY))
        {
            pbuf   = (uint8_t *)pdev->dev.class_cb->GetOtherConfigDescriptor(pdev->cfg.speed, &len);
        }
#endif
        pbuf[1] = USB_DESC_TYPE_CONFIGURATION;
        pdev->dev.pConfig_descriptor = pbuf;
        break;

    case USB_DESC_TYPE_STRING:
        switch ((uint8_t)(req->wValue))
        {
        case USBD_IDX_LANGID_STR:
            pbuf = pdev->dev.usr_device->GetLangIDStrDescriptor(pdev->cfg.speed, &len);
            break;

        case USBD_IDX_MFC_STR:
            pbuf = pdev->dev.usr_device->GetManufacturerStrDescriptor(pdev->cfg.speed, &len);
            break;

        case USBD_IDX_PRODUCT_STR:
            pbuf = pdev->dev.usr_device->GetProductStrDescriptor(pdev->cfg.speed, &len);
            break;

        case USBD_IDX_SERIAL_STR:
            pbuf = pdev->dev.usr_device->GetSerialStrDescriptor(pdev->cfg.speed, &len);
            break;

        case USBD_IDX_CONFIG_STR:
            pbuf = pdev->dev.usr_device->GetConfigurationStrDescriptor(pdev->cfg.speed, &len);
            break;

        case USBD_IDX_INTERFACE_STR:
            pbuf = pdev->dev.usr_device->GetInterfaceStrDescriptor(pdev->cfg.speed, &len);
            break;

        default:
#ifdef USB_SUPPORT_USER_STRING_DESC
            pbuf = pdev->dev.class_cb->GetUsrStrDescriptor(pdev->cfg.speed, (req->wValue) , &len);
            break;
#else
            USBD_CtlError(pdev , req);
            return;
#endif /* USBD_CtlError(pdev , req); */
        }
        break;
    case USB_DESC_TYPE_DEVICE_QUALIFIER:
#ifdef USB_OTG_HS_CORE
        if(pdev->cfg.speed == USB_OTG_SPEED_HIGH  )
        {

            pbuf   = (uint8_t *)pdev->dev.class_cb->GetConfigDescriptor(pdev->cfg.speed, &len);

            USBD_DeviceQualifierDesc[4]= pbuf[14];
            USBD_DeviceQualifierDesc[5]= pbuf[15];
            USBD_DeviceQualifierDesc[6]= pbuf[16];

            pbuf = USBD_DeviceQualifierDesc;
            len  = USB_LEN_DEV_QUALIFIER_DESC;
            break;
        }
        else
        {
            USBD_CtlError(pdev , req);
            return;
        }
#else
        USBD_CtlError(pdev , req);
        return;
#endif

    case USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION:
#ifdef USB_OTG_HS_CORE

        if(pdev->cfg.speed == USB_OTG_SPEED_HIGH  )
        {
            pbuf   = (uint8_t *)pdev->dev.class_cb->GetOtherConfigDescriptor(pdev->cfg.speed, &len);
            pbuf[1] = USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION;
            break;
        }
        else
        {
            USBD_CtlError(pdev , req);
            return;
        }
#else
        USBD_CtlError(pdev , req);
        return;
#endif


    default:
        USBD_CtlError(pdev , req);
        return;
    }

    if((len != 0)&& (req->wLength != 0))
    {

        len = MIN(len , req->wLength);

        USBD_CtlSendData (pdev,
                          pbuf,
                          len);
    }

}

/**
* @brief  USBD_SetAddress
*         Set device address
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_SetAddress(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{
    uint8_t  dev_addr;

    if ((req->wIndex == 0) && (req->wLength == 0))
    {
        dev_addr = (uint8_t)(req->wValue) & 0x7F;

        if (pdev->dev.device_status == USB_OTG_CONFIGURED)
        {
            USBD_CtlError(pdev , req);
        }
        else
        {
            pdev->dev.device_address = dev_addr;
            DCD_EP_SetAddress(pdev, dev_addr);
            USBD_CtlSendStatus(pdev);

            if (dev_addr != 0)
            {
                pdev->dev.device_status  = USB_OTG_ADDRESSED;
            }
            else
            {
                pdev->dev.device_status  = USB_OTG_DEFAULT;
            }
        }
    }
    else
    {
        USBD_CtlError(pdev , req);
    }
}

/**
* @brief  USBD_SetConfig
*         Handle Set device configuration request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_SetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req)
{

    static uint8_t  cfgidx;

    cfgidx = (uint8_t)(req->wValue);

    if (cfgidx > USBD_CFG_MAX_NUM )
    {
        USBD_CtlError(pdev , req);
    }
    else
    {
        switch (pdev->dev.device_status)
        {
        case USB_OTG_ADDRESSED:
            if (cfgidx)
            {
                pdev->dev.device_config = cfgidx;
                pdev->dev.device_status = USB_OTG_CONFIGURED;
                USBD_SetCfg(pdev , cfgidx);
                USBD_CtlSendStatus(pdev);
            }
            else
            {
                USBD_CtlSendStatus(pdev);
            }
            break;

        case USB_OTG_CONFIGURED:
            if (cfgidx == 0)
            {
                pdev->dev.device_status = USB_OTG_ADDRESSED;
                pdev->dev.device_config = cfgidx;
                USBD_ClrCfg(pdev , cfgidx);
                USBD_CtlSendStatus(pdev);

            }
            else  if (cfgidx != pdev->dev.device_config)
            {
                /* Clear old configuration */
                USBD_ClrCfg(pdev , pdev->dev.device_config);

                /* set new configuration */
                pdev->dev.device_config = cfgidx;
                USBD_SetCfg(pdev , cfgidx);
                USBD_CtlSendStatus(pdev);
            }
            else
            {
                USBD_CtlSendStatus(pdev);
            }
            break;

        default:
            USBD_CtlError(pdev , req);
            break;
        }
    }
}

/**
* @brief  USBD_GetConfig
*         Handle Get device configuration request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_GetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req)
{

    if (req->wLength != 1)
    {
        USBD_CtlError(pdev , req);
    }
    else
    {
        switch (pdev->dev.device_status )
        {
        case USB_OTG_ADDRESSED:

            USBD_CtlSendData (pdev,
                              (uint8_t *)&USBD_default_cfg,
                              1);
            break;

        case USB_OTG_CONFIGURED:

            USBD_CtlSendData (pdev,
                              &pdev->dev.device_config,
                              1);
            break;

        default:
            USBD_CtlError(pdev , req);
            break;
        }
    }
}

/**
* @brief  USBD_GetStatus
*         Handle Get Status request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_GetStatus(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req)
{


    switch (pdev->dev.device_status)
    {
    case USB_OTG_ADDRESSED:
    case USB_OTG_CONFIGURED:

#ifdef USBD_SELF_POWERED
        USBD_cfg_status = USB_CONFIG_SELF_POWERED;
#else
        USBD_cfg_status = 0x00;
#endif

        if (pdev->dev.DevRemoteWakeup)
        {
            USBD_cfg_status |= USB_CONFIG_REMOTE_WAKEUP;
        }

        USBD_CtlSendData (pdev,
                          (uint8_t *)&USBD_cfg_status,
                          2);
        break;

    default :
        USBD_CtlError(pdev , req);
        break;
    }
}


/**
* @brief  USBD_SetFeature
*         Handle Set device feature request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_SetFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{

    USB_OTG_DCTL_TypeDef     dctl;
    uint8_t test_mode = 0;

    if (req->wValue == USB_FEATURE_REMOTE_WAKEUP)
    {
        pdev->dev.DevRemoteWakeup = 1;
        pdev->dev.class_cb->Setup (pdev, req);
        USBD_CtlSendStatus(pdev);
    }

    else if ((req->wValue == USB_FEATURE_TEST_MODE) &&
             ((req->wIndex & 0xFF) == 0))
    {
        dctl.d32 = USB_OTG_READ_REG32(&pdev->regs.DREGS->DCTL);

        test_mode = req->wIndex >> 8;
        switch (test_mode)
        {
        case 1: // TEST_J
            dctl.b.tstctl = 1;
            break;

        case 2: // TEST_K
            dctl.b.tstctl = 2;
            break;

        case 3: // TEST_SE0_NAK
            dctl.b.tstctl = 3;
            break;

        case 4: // TEST_PACKET
            dctl.b.tstctl = 4;
            break;

        case 5: // TEST_FORCE_ENABLE
            dctl.b.tstctl = 5;
            break;
        }
        SET_TEST_MODE = dctl;
        pdev->dev.test_mode = 1;
        USBD_CtlSendStatus(pdev);
    }

}


/**
* @brief  USBD_ClrFeature
*         Handle clear device feature request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_ClrFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{
    switch (pdev->dev.device_status)
    {
    case USB_OTG_ADDRESSED:
    case USB_OTG_CONFIGURED:
        if (req->wValue == USB_FEATURE_REMOTE_WAKEUP)
        {
            pdev->dev.DevRemoteWakeup = 0;
            pdev->dev.class_cb->Setup (pdev, req);
            USBD_CtlSendStatus(pdev);
        }
        break;

    default :
        USBD_CtlError(pdev , req);
        break;
    }
}

/**
* @brief  USBD_ParseSetupRequest
*         Copy buffer into setup structure
* @param  pdev: device instance
* @param  req: usb request
* @retval None
*/

void USBD_ParseSetupRequest( USB_OTG_CORE_HANDLE  *pdev,
                             USB_SETUP_REQ *req)
{
    req->bmRequest     = *(uint8_t *)  (pdev->dev.setup_packet);
    req->bRequest      = *(uint8_t *)  (pdev->dev.setup_packet +  1);
    req->wValue        = SWAPBYTE      (pdev->dev.setup_packet +  2);
    req->wIndex        = SWAPBYTE      (pdev->dev.setup_packet +  4);
    req->wLength       = SWAPBYTE      (pdev->dev.setup_packet +  6);

    pdev->dev.in_ep[0].ctl_data_len = req->wLength  ;
    pdev->dev.device_state = USB_OTG_EP0_SETUP;
}

/**
* @brief  USBD_CtlError
*         Handle USB low level Error
* @param  pdev: device instance
* @param  req: usb request
* @retval None
*/

void USBD_CtlError( USB_OTG_CORE_HANDLE  *pdev,
                    USB_SETUP_REQ *req)
{

    DCD_EP_Stall(pdev , 0x80);
    DCD_EP_Stall(pdev , 0);
    USB_OTG_EP0_OutStart(pdev);
}


/**
  * @brief  USBD_GetString
  *         Convert Ascii string into unicode one
  * @param  desc : descriptor buffer
  * @param  unicode : Formatted string buffer (unicode)
  * @param  len : descriptor length
  * @retval None
  */
void USBD_GetString(uint8_t *desc, uint8_t *unicode, uint16_t *len)
{
    uint8_t idx = 0;

    if (desc != NULL)
    {
        *len =  USBD_GetLen(desc) * 2 + 2;
        unicode[idx++] = *len;
        unicode[idx++] =  USB_DESC_TYPE_STRING;

        while (*desc != 0)
        {
            unicode[idx++] = *desc++;
            unicode[idx++] =  0x00;
        }
    }
}

/**
  * @brief  USBD_GetLen
  *         return the string length
   * @param  buf : pointer to the ascii string buffer
  * @retval string length
  */
static uint8_t USBD_GetLen(uint8_t *buf)
{
    uint8_t  len = 0;

    while (*buf != 0)
    {
        len++;
        buf++;
    }

    return len;
}
/**
  * @}
  */


/**
  * @}
  */


/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
